package day0709;
//引入  文件夹.Scanner;
import java.util.Scanner;

public class Test1 {
    public static void main(String[] args) {
        //1.引用类型变量s,并赋值
        Scanner  s=new Scanner(System.in);
        //2.用变量s调用nextDouble()函数输入double数据
        double d=s.nextDouble();
    }
}









